Improvement in pitman-rods



B. E. CARPENTER PI'IMAN-ROD.

No.189,187. Patented April 3, 1877.

WITNESSES INVENTOR W 44mg W- a /4% cr7* as ATTORNEW N.PETERS, PNOTD-LITHOGRAPHER, WASHINGTON 0 C.

STATES PATENT OEEIcE.

BURR E. CARPENTER, OF PLAIN CITY, OHIO.

IMPROVEMENT IN PlTMAN-RODS.

Specification forming part of Letters Patent N 0. 189,187, dated April 3, 1877; application filed February 24, 1877.

To all whom it may concern: I

Be it known that I, BURR E. CARPENTER, of Plain City, in the county of Madison and State of Ohio, have invented a new and valuable Improvement in Pitman Rods; and I do hereby declare that the following is a full,

clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a side elevation, part sectional; and Figs. 2, 3, 4, 5, and 6 are detail views thereof.

This invention relates to pitman-rods for operating the cutter-bars of harvesters; and it consists in certain peculiar devices for connecting the same to a crank-wheel at one end and a cutter-bar at the other, substantially as hereinafter set forth and claimed.

In the accompanying drawings, A designates the small crank-wheel of a mower or harvester, which Operatespitman-md B and cutter-bar O. Said. crank-wheel is provided with an eccentric perforation, a, for the attachment of the crank or wrist pin, and also with a segment-a1 bar, a, on the side opposite to said crank, for counterbalancing the latter. Said wheel A is peripherally grooved at 0, as shown in detail in Flg. 6.

D designates a clamping-strap, which surrounds said wheel and sets into groove 0?. Said strap is not completed on the side toward pitman B, and its two ends at d are there straightened, so as to be parallel to said rod. These ends are passed through movable yoke or slide D and into fixed yoke D The rear end of pitman B passes through a perforation in fixed yoke D and sets into a recess in the front of movable yoke or slide D end is screw-threaded at b, to receive clamping-nuts b. By means of said nuts the said rear end b of pitinan B is drawn back against sliding yoke D and collar D is thus tightened on wheel A.

The outer end of said pitman is provided Said rear with a ball, B, (shown in Fig. 5.) which sets into a suitable socket formed by the inside of a sectional box. (Shown in Fig. 4.) This box consists of a fixed part, E, and a hinged part, E These parts are provided with complementary extensions 0 e, which together form a screw-threaded stud, E F designates a nut, which screws upon said stud E to clamp said sections E and E together around said ball B. This not is provided with a surrounding ratchet or toothed collar, F, which is engaged by a retaining-spring, G, whereby said nut is prevented from turning so as to slip off from stud E and allow said sections to separate. Said spring is secured to fixed section E, and both sectionsE E, are attached to cutter-bar C. When clamped together, as stated, said sections form an approximately globular socket, which is slotted 011 the top and toward pitman B, so as to allow cutterbar 0 to tilt up and down independently of said pitman, thus conforming to the inequalities of the ground. This method of attachment forms a very convenient universal joint. I do not, however, claim an universal joint applied to harvester pitman-rods andv cutterbars, being aware that such application is not broadly new.

What I claim as new, and-desire to secure 7 by Letters Patent, is

1. The combination of circumferentiallygrooved wheel A with collar D, having ends d d, yokes D D pitman B, and nuts b, substantially as and for the purpose set forth.

2. Wheel A, provided with crank -hole a,

counterbalance a and circumferential groove (1 in combination with a pitman-rod and collar connection, substantially as and for the purpose set sorth.

In testimony that I claim the above 1 have hereunto subscribed my name in the presence of two witnesses.

BURB. E. CARPENTER.

Witnesses: y

WESLEY CARPENTER, ANDREW CARY. 

